1) Yes, generally, the debt is assumed or refinanced and as such, only the Equity portion is financed (ie 50/50).
2) Always use normalized figures; please clarify your question.
3) Tax rate is usually the marginal statutory tax rate, correct.
4) Similarly, interest rate would be the marginal cost of new debt for the acquisition; for simplicity, use current weighted average YTM of acquiror's debt, unless other information is available; per our complex M&A models, we estimate and split into specific tranches and types of debt with associated interest rates.
5) Correct, A/D is an accrual analysis. for Cash EPS A/D, one would make adjustments to EPS. Pre-FASB 141/142, this was generally done for goodwill amortization; nothing else is material enough to impact.
6) Relevant for companies with a lot of hard assets (manufacturers with PPE & inventory, etc); else it's not all that relevant, especially for service based businesses. However, for other businesses, like pharma, PPA is important for intangibles (but that's not FMV step-up related).
7) In our Complex M&A class, and even our Simple Merger Model (and Intermediate) we do include fees in Sources & Uses of funds. A/D is a back-of-the-envelope analysis for quick & dirty; we usually say A/D analysis captures 90% of the "final" answer; our Simple Merger Model captures 95%; our Intermediate Merger Model captures 97%; and our super-complex one captures 99% (of course, garbage in, garbage out applies).